Thermostatic gas-burner.



H. SCHNEIDER. THERMOSTATIG GAS BURNER.

APPLICATION FILED SEPT. 9, 1912.

Patented Apr. 29, 1913.

INV Era-ro R Huso ScHINEiDER Huso scHNEIDER, or CLEVELAND, oHIo.

recense.,

A'JIHILRIVIOS'IpATIC GAS-BURNER.

Specification of Letters Patent.

- natentea apr. as, iets.

Application filed September 9, 1912. Serial No. 719,276.

v 'V .To all whom t may concern Beit known that I, HUGO SCHNEIDER, citizen of the United States', residing at Cleveland, in the county of Cuyahoga and State of Ohiohave invented certain new and useful Improvements in Thermostatic Gas- Burners, of which the following is a speci- `iication.

This invention relates to and com-prises a thermostatic gas burner, substantially as herein shown and described and more particularly pointed out in the claims.

In general, the object is to provide auto-A matic mechanism to instantly cut off the supply of as when the vflame at the burner is extingulshed.- To produce this result, the

, invention includes means to permit a differf entlal movement 1n the operating connections, and also embodies a thermostat-ic tube adapted to be used either as a pilot light or heating burner or both.

The invention 'is also applicable to illumi-` nating burners of the kind shown in my Letters Patent No. 947,310, and dated J anuary 25, 1910.7

In the accompanying drawings, Figure 1 is 'a plan view of an installation vof my invention with a two-burner setting for the use of gas and the thermostatic tube shown as located between the same and sectioned lengthwise to disclose the internal construe` tion thereof. Fig. 2 is a side elevation of the devices seen ill-Fig. 1 and partially sectioned. Fig. 3 is a view looking in from the left ofV Fig. 2 and designed to.show the means whereby the 4shut-off mechanism is sensitized to the thermostat, as hereinafter fully described. Fig. 4 is anV enlarged sectional elevation of the shut-01T valve and the immediate means for depressing the same to open position. 'Ihe mechanism as thus shown has as its primary object to close the gas inlet valve o automatically practically at the instantpthat the heat which' controls the thermostat a fails and the thermostat begins to cool. It

.is not designed to wait until the thermostat it be originated directly in the thermostat,

itself or is communicated thereto from the :burners b or other` source of heat. These burners may have any form or shape and be either vertically or horizontally placed in a stove or furnace of any kind. To these ends I provide an embodiment comprising a caslng which, for convenience, consists of four several sections 1, 2, 3 and 4, built one upon the 'other and variously constructed according to position and'u'se in each case but constituting a unitary casing for all practical purposes. .'Ihus, the lower section 1 is the base through which the gas flows from supply pipe 5 having. hand shut off valve' 6. The valve o having to do more directly with my invention is located in screw-threaded coupling7 which unites sections 1 and 2, and closes against the bottom of said coupling. The said valve has a tubular body passing through said coupling and is adapted to slide therein and has. a slot 8 lengthwise between its ends adapted to be closed when the valveis raised, as in Fig. 4, but saidslot is open for the passage of .more or less gas through the same when the valve is depressed.

A' spring 9 about the upper portion of the valve bears upon seat 7 and holds the valve in closed posi-tionnormally, and an, arm 10 on t-ransversegsha-ft 11 bears upon the top ofl the valve and' depresses the same in the opening operation'. The said shaft 11 is rotatably mounted in a swell or enlargement 12 on the side of section 2 and means for rotating the same are connected with the end thereof projecting outside said swell and comprisea collar c fixed on said shaft by a set screw or itsy equivalent and provided with two earse inside,andna link h is secured between said` ears by a pin 13 through the same. The lever 14 is connected with the said link at one end and 'is pivoted at its other endon a screw 15 engaged lin a boss 16 integral with and standing out laterally from the casing 2. A limited up'and down movement ofthe said lever at its linked endis thus provided and it isvada ted to cause the requisite rotation of Vsha. 11 to depress valve c through arm 10 bearing on the top thereof as above described.' This depression occurs from thermostat a through all the intervening parts` are taken v(in account, it being` remembered that the thermostat is intended to close the valve a by its own contraction. To this end the thermostat comprises a brass or like outer tube 17 of a suitable si'ze removably fixed upon the upper tubular casing sect-ion 4, which tube is shown as having a slot 18 lengthwise in its middle port-ion through which gas is adapted to issue. One or more slots may be used depending upon the length and diameter of the tube, or in lieu of a slot or slots I may employ gasoutlets of other form.

A steel or like metal rod 19 is fixed at one end in t-he outer end of tube 17 and projects through the other or inner end into casing 4 where it is engaged between ears on the collar 20 on cross pin 21 in the top of said casing.` The said pin projects through the sides of the said casing and a yoke y is fixed on the ends thereof bysetscrews or the like and has ears 22 on which the sha-ft 23 is pivotally connected at its upper burner tu end while the said shaft is shown as bored from its lower end and splitpart way and ascrew 24 is adapted to slide frict-ionally therein a good working distance. An adjusting collar 25 on said screw fixes the point at which the said shaft 23 will stop on the screw when the shaft is depressed through yoke y 'and said screw is projected loosely through a ide 26 on casing section 2 and a collar 27 thereon beneath said guide limits the upward'movement of the screw against guide 26. The point of the said screw 24 bears'in a cavity in a screw head 30 having a threaded portion adjust-l ably mounted on the inside of lever 14 near its pivot, and thus the expanding action of the thermostat is mechanically conveyed to depress the said lever 14 and open valve a. This valve may also be4 o ned by hand through a lever 33 either a xed to collar c on shaft 11 or loosely mounted on said shaft and adapted to bea-r upon the projected end of pivot pin 13 through the ears e.v In other words the said hand lever enables theoperator to open valve 'v and let in a sufficient volume of heat the thermostat. This is but a momentary operation and need be repeated only when starting of thedevice occurs. Otherwise the work is done by the thermostat. The as issuin from burner outlet 18 may be l1 hted an serve alone to heat the tube or can alsofutilize hea-t from the burners b or their equivalent to aid in keeping the thermostat-at aworkingA temperature.- l

The burner tube 17 receives its supplyl of gas from or through the upper section 4 of the casin whichis also the mixer for said Said tube 17 also has slight perforations or jets d oppositely at its top and side through which gas issues and which serve to light theA said burners b automatigas which, when ignited, will cally from the said burner tube. The said tube or burner thus becomes also a pilotlight for the side burners and in fact is a burner in itself besides having itsl thermostatic function. Of course when the attendant is present and throu h with all the burners they are turned o at the valves 6 and g. This will shut o'if all gas t0 the device, but when desired, the pilot burner 17 can be allowed to burn more or less indefinitely and it will emit enough heat for keeping vessels hot on the stove immediately over the same, or the tube 17 may be larger than as shown to. yield more heat and to operate entirely independent of Oother burners.

A thermostat tube constructed to serve as a burner is of advantage in that it is immediately responsive to the heat generatedand will expand very quickly especially if the llame is produced lengthwise thereof at one or both'sides. On the other hand, quick contraction is also obtained when theflame is extinguished, 'as the mixer 4 will take in col air which will cool the tube in passing through the same and out of its slot l8. Then in order that this quick expansion and contraction of the tube 17 may be utilized, I provide the friction clamping member 23 and part 24 having stop col ars 25 and 27, or any equivalent means, to act instantly on the valve lever 14 to open and close the valve. Thus the frictional bind of the split en d of member 23 upon the` screw-threaded part. 24 is sufficient to pro'4 duce a common lift movement between said parts in lreleasing the lever when initial.

contraction of tube 17 takes place', and until collar 27 engages guide l 26. Thereafter as the tube 17 continues" to'cbntract as obvlously it must to its maximum, the splitvmember 23 will slide in respect to part 24, the.

collar 27 limiting further upward-movement I of part 24. In other words, this differential ,movement in the connection operates to imclosing ofthe valve on the initial contrac.

tion of the tube-17 in the event of the llame being extinguished as herelnbefore described.

. What I claim is:

1. A thermostatic burner having a horizontally disposed tube with a slot in its side for the escape of gas and a mixer for air and gas open toy said tube, in combination with a valve and a rodconnected with the said burner.

2. A thermostatic burner consisting of a tube with a slot lengthwise in its side, a gas and air vmixer supporting said tube, a gas inlet valve and means to open the same comprising a rod in said tube adapted to be actuated by the expansion thereof, a lever and means to depress said valve and operating connections in actuating relations with one end of said rod and bearing upon saidlever.

3. The mechanism described comprisinga casing with a gas and air mixer in its top and a gas inlet valve in its bottom, a burner tube at the side and top ofrsaid mixer and a lever mechanism to open said valve, in combination with a rod in said burner tube adapted to be actuated when said tube .is heated, a rock shaft in said,mixer operated by said rod and mechanism actuated by said rockshaft having .operating connect-ion with the said lever mechanism to open said valve.

4. A supporting casing, a gas inlet valve in the bottom of said casing and a gas mixer on the top thereof, a thermostatic tube projecting horizontally from the side of said mixer, a rod fixed at one end in the outer end of said tube, a rock shaft in the top of said mixer with which said rod is operatively connected, and extensible means operatively connected with said rock shaft and adapted to open said valve- In testimony whereof I aiiix my signature in presence of two witnesses.

HUGO SCHNEIDER.' 

